Combination ignition lock



E. v. l..ARs'oN COMBINATION IGNITION LOCK Aug. 20, 1929.

Filed May 21, 1927 0 l a i H v H Patented Aug. 20, 1929.

UNITED STATES ERIC VALFR-ID LARSON, OF NEW ROCHELLE, NEW YORK.

COMBINATION IGNITION LOCK.

Application filed May 21,

This invention relates to improvements in safety locks .for automobiles and more particularly to looks for the ignition apparatus and its object is to provide a combination lock whereby the closing of the ignition circuit to permit starting the automobile is dependent upon the selection of a certain combination known only to the owner.

A further object is to provide a lock of this type wherein the said combination may be changed very readily by one thoroughly familiar with its construction, arrangement and operation.

A further object is to provide an efficient lock of this type that is cheap to manufacture, of few parts and that is not easily disarranged or liable to get out of order.

lVith the foregoing and other objects in View the invent-ion consists in the combination and arrangement of parts to behereinafter fully described, pointed out in the appended claim and illustrated in the accompanying drawing which forms a part of this application and in which Fig. 1 is a view of the lock in front elevation.

Fig. 2 is a top plan view of Fig. 1.

Fig. 3 is a vertical sectional view on line 33 of Fig. 2.

Fig. 4: is a section taken on line 44 of Fi 3.

like reference characters denote corresponding parts throughout the several views.

For convenience the lock is preferably located upon the dash and it comprises an oblong plate 1 preferably countersunk in the dash and connected by braces 2 to the inside or second plate 3. A plurality, preferably three, of rings 4, 5, 6 each formed with graduations 7 are formed upon the plate 1 and through the center of each ring and through the plates 1 and 3 a rotary shaft 8 extends that is isolated from the plate 1 by the collar 9.

Fast upon the outer end of each shaft 8 is a knob 10 that carries an indicator 11 adapted to register with the ring graduations 7. A metal sleeve 12 loosely receives each shaft 8, said sleeves extending through the plate 3 and at their inner extremities being formed with the integral posts 13 each of which carries a screw 11 whereby one end of one wire 15 is secured, two of said wires 15 extending from said posts 13 to the annular metal members 16 and the third wire 1927. Serial No. 193,243.

15 extending to a binding post 17 at one end of the plate 3, a similar binding post 18 at the opposite end of the plate 3 being connected by a wire 19 to one of the three annular members 16. From the two binding posts 17, 18 wires 20 lead to the ignition circuit.

Each annular member 16 is mounted upon an insulation hub 21 which separates said member from the plate 3 and from the sleeve 12 and said hub is formed with a diminished portion 22 that separates said sleeve and plate 12, 3. The forward termination 23 of the insulation hub is serrated, as shown in Fig. 3, and releasably carries an insulation ring 21 the inner periphery of which is formed to receive the serrated portion 23, said ring being formed also with a groove to receive the integral metal finger formed upon each member 16, said finger serving as a contact point for the flexible contact 26 that at one end is mounted upon the said shaft 8 and releasably made fast thereto by the screw 27.

hen the indicators 11 are set in a predetermined manner with relation to the graduations 7 the three flexible contacts 26 will rest upon the three metal fingers 25 and the current can pass from post 17 to post 18 through the wires 15, sleeves 12 and shafts 8 but if one contact 26 is disengaged from its finger 25 the circuit will be broken and so the ignition circuit will be open. To change the combination one or more of the members 16 together with a corresponding number of rings 24 will be manually withdrawn from the insulation hub, or hubs 21 and adjusted relative to said hubs and to the graduated rings 4, 5, 6 so that the same graduation upon said rings will no longer be denoted by the indicator when the contacts 26, 25 are engaged. It is understood, of course, that the shafts 8 and contacts 26 are rotated by means of the knobs 10 that carry the indicators 11.

What is claimed is In a combination look, a, plate, a second plate spaced therefrom, a rotary shaft connecting said plates, terminal posts carried by said second plate, a graduated ring formed upon said first plate and centered. about said shaft, a fixed sleeve extending through said second plate and receiving said shaft, insulation separating said sleeve and second plate, a separate grooved insulation ring removably arranged upon said insulation, a manually adjustable annular member arranged upon said insulation, a Wire connecting said sleeve to one terminal post, 5 a Wire connecting said annular member and the second terminal post a. contact finger integral with said annular member disposed in the grooved portion of said insulation ring, a contact fast upon said rotary shaft for releasable engagement with said finger, and an indicator fast upon said shaft for registration with the said graduated ring.

In testimon; that I claim the foregoing as my own I have hereto afiixed my signature.

ERIC VALFRID LARSON. 

